As you requested – images are set on every desktop of your displays
Roll doesn’t open blank
System background changer doesn’t conflict with Wallpaper Wizard
Works perfectly in full screen
A lot of performance improvements

https://itunes.apple.com/us/app/wallpaper-wizard-2/id1266674560?mt=12

Choose from hundreds of curated desktop pictures in HD, and the app will set you a new background every week, day, or hour. Finally, you can spare yourself the pain of sifting through Google Images — with Wallpaper Wizard 2, you’ll have enough fresh wallpapers for your Mac’s entire lifetime.